Patent AU-2021338582-B2 (AU)
Title: Magnesium alloy ultra-high porosity micro-arc oxidation coating, preparation method and application thereof
Inventor: LI TAO
IPC: C23C4/10
Filed: 2021-03-31
Granted: 2023-06-15
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(54) Title: MAGNESIUM ALLOY ULTRAHIGH-POROSITY MICRO-ARC OXIDATION COATING, PREPARATION METHOD 
THEREFOR AND USE THEREOF 
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(57) Abstract: A magnesium alloy ultrahigh-porosity micro-arc 
oxidation coating, a preparation method therefor and the use there
of. After a magnesium alloy is sequentially subjected to pre-treat
ment, ultrasonic cleaning, barrier film preparation, a cathodic mi
cro-arc electrodepositiontreatment and an anodic micro-arc oxida
tion treatment, an ultrahigh-porosity micro-arc oxidation coating 
having excellent bonding strength and mechanical performance 
can be prepared on the surface of the alloy. The porosity of the 
micro-arc oxidation coating is not less than 50%, and the microp
ore diameter thereof is 0.5 m-3 m. In the method, various steps 
are sequentially carried out, the target is clear, the respective ad
vantages of the cathodic micro-arc electrodepositiontreatment and 
the anodic micro-arc oxidation treatment are fully combined, and 
1 a high-quality target coating can be formed by merely one set of 
power source devices.  
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